Tire



' F'. L. MARSHALL.

TIRE. APPLICATION FILED MAY 6, 1'915- RENEWED JAN. 2l. 1922.

PatentedAug. 15, 1922.

f so

,FRANK L. MARSHALL, o F nnwronv cnnrna;iyrlissAorrusETTsQi` I TIRE;

ToaZZ 'uv/lm t may concern: l Be "it known that I, FRANK L. MARSHALL,

.avcitiz'enof the United States, residing at -Newton Center, in the county'of Middlesex non; f

The jmain `object of the invention fis to 'secure a tire which is resilient and-durable fand not 'affected by 'punctures NA further object ofthe invention isjto provide a tireoffsuch form of construction .thatfthe outer portion or shoe may be cornpletelyworn down without affecting its jvetli- Cien'cyp Anotherl object of the invention is to vprovide 'means whereby the strain on thatl portion of the tire Iin contact with the ground .is .distributed throughoutits jentire circunn-` ference. i f Other objects of 4the invention. will be more specifically 'describedhereinafter.k Y Briefly,y my invention,y comprises 'a tire inadeup of an outer shoe of ordinary 'construction," an inner metallic hoopfor maintaining the' shoe iny an inflated condition'.

inner surface ofthe shoe-ff lf f In the drawings illustrating the preferred embodiment of the invention, Figure l' isa anda cushion between 'the'hoop andthe( sidefelevation of a tire constructed in ac- Y i 'In-.Figure I have-*shown-a form of tire 'cordance with my 'invention,' portions of said-view being broken away toshow the interior construction partly in lelevationand partly in se'ctiong-Fig. 2 is across-sectional view on line 2 2 in y a cross-sectional'view'of a modified forlnof tire. i l

'y .In the drawings illustratingthe preferred embodimentof niy inventionis shown la tire made up'of an vouter shoe t ofwell known f and ordinaryconstruction, 'an endless hoop 5f'and"a cushion 6 interposed ,between'the hoop and the shoe. The hoop 5 is made of metal, preferably tempered steel, andalthough it lmaybe solid,l I prefer to use a lhoo-p which is hollow and elliptical inv crosssection as shown inthe drawing. The ycushyion' may be made of any resilient inaterial such'as rubber or rubber composition andy Specicationgof Ii.ettersPatent.y

cavities 7.

Vsponds 'to -the curved Vshoe when'iniiated and yshoewithin the. flanges V9 off provide ,a ring l0 o-fany suitable non -re'siL' f at intervals around the igure l and Fig. `8 is' maybe solidV o r l The cushion curvedin cross-section so' -Jthat 'its outer faceK4 correinner` surface s of the its innerface is pro-k ipe-teilt@ Aus-f1.5 1922?' Renewed Jna'ryar 1922.- Serial ,531,005-

providedi'with a plurality of vided with 'achannel to receive-'theighoop lthe sides of the khoop is in use. Although I have shown the cush- Ina-y, if` desired, be Inade ,integral therewith, or'the shoe may be provided .with acushion onit's.innergface.; '1' i v'llhewsidesof thec-ushion partially envelop.- u' i i so'as to preventany lateral niovenientofthe-saineiwhentheftirev I ientrrn'aterial "having yits'sides curved Yupl wardlytoconform'to, andtsupport the inner surfaces ofthe lips :and sidfe'ssof `the sshoje.

The ringl() also engagesy theft sides of the cushion'y 6 and maintains-it in. ace'ntral" position with respect to thetread ofthe shoe.-l

'--l.f desiredV an additional cushion llmay be interposed lbetween the ring 1oy and the 'endless hoop' and this cushioninay also" be y either solidor provided l:with'a plurality of air cavities l2 s irnilart the-cushion6.` 1"(See Figs.' land 2.) -Inor'dento Ipermit' `of'a circulation of air through the tire;` inf'order 10`- are pierced bykr air passages 16 arranged tire andl,'Fiff;' desired, the air cavities ,Y may air-cavities l2 by` channels ,17- Cubin-.fthe cushion' Gatintervals. 4

815iv to preventheating, the'riin land' thefring be 'connected to the ,'90

'which is 'adapted for light vehicles andfin differenti-'shapein" cross-section from the ring 1 0shownvin Figure2 and isfpreferablyv hollow at `lt,"withfthefsides extending up`= wardlyto support' the cushion this formthe; cushion betweenthe' `and l the hoop 5 is oinitte'd.I lnfthefuse of be found necessary tok'ass'einble `the 1tireand mo-unt'it'on the rim-byineans of special afp-y paratlu's, because` the fcushion b` -is first placed inposition in fthe shoe, next-thehoop 5, then the cushion 11 vand lastly thel ring lOfand the lips ofthe tire areftheniinounted withinthel 110 sly-'invention' lewin prbbiy flanges 9 andthe two parts of the rim are forced together and locked in position. As thus assembled the shoe is fully inflated and any flattening of the Shoe where it engages the pavement is counter-acted by the hoop 5. As the tire tends to flatten at the point where it engages the pavement, the hoop is bent 'inwardly which forces the EOP 0f the hoop up against the cushion in that portion ofthe tire which is uppermostv at the time and the sides of the hoop are forced outwardly vagainst the cushions on the sides of the tire. `The result is that any tendency to flatten the hoop. and cause it to diverge from a true circle by the weight on the tire is opposed by the cushion between the hoop and the shoe throughoutthe entirecircumference of the shoe. In short the strain placed upon the hoop Iat the point where the shoe is in contactv with the pavement is distributed throughout the entire tire and thereby lany Asubstantial flattening of the shoe at the point ofrcontact is'prevented. The interposition of the cushion between the shoe 4and the metallic hoop serves to render thetire resilient,

Nflexible` andA Aeasy `riding' and the vamount of` this resiliency may be regulated by changneither will it rbe subject to blowouts and these two principal causes ofy tire trouble are absolutely eradicated. At the same timeit may also be noted 'that the life of the tire is greatly increased because the shoe can be used vuntil the tread is entirely worn down to the'cushion. l

Another advantage of my tire is that the -heating Awhich is noticeable in tires'inflated with air is reduced to a minmum and I have found from experience that a tire of my construction 'can be run continuously for long periods without becoming heated. rllhis feature, lof course, adds to thev wearing qualities ofthe tire and prevents disintegration of the rubber. i,

lt will be observed that the main feature of my invention consists in providing resilient means for holding the shoe in a distended position, lthe means being so constructed that the strain-upon, the tire is distributed equally throughout the entire circumference.

Although l have described and illustrated one form of my invention I do not wish to be limited to the particular form shown and described because the invention may be em bodied in other and different forms without departing from the spirit thereof, and. l desiroto claim the invention vbroadly exceptk where limited specifically in the following claims.

What l claim isty l. A tire comprising ashoe, a soft resilient cushion within said shoeengaging the inner surface thereof and having a plurality of air cavities and an endless hollow metallic hoop engaging said cushion of substantial thickness to maintain-said shoein a distended condition.

2. A tire having, in combination, a shoe, i

a hollow endless metallic hoop withinsaid shoe,.soft resilient means between said shoe and said hoop, a ring having curvedsides for engaging and supporting the lips `and sides of the shoe and a cushion interposed between said ringand said hoop. f

3. A tire comprising a shoe, a hollow endlesshoop vwithin saidshoe said hoop being entirely surrounded by `soft resilient means whereby any pressure exerted; on said shoe is, through the medium of said resilient means, distributed throughout the shoe.

.41.. kThe combination ofl a wheelrima shoe on said rim, a hollowendlesl hoop within `said shoe, a soft Aresilient cushion between said shoe land said hoop and asecond lsoft resilient cushion between said hoop and 'said rim.` i i l 5. The combination of a wheel rim, a shoe on said rim, a hollow endless .hoop within said shoe, a soft resilient cushionI lbetween saidshoe and said hoop and a second soft resilientcushion having air cavities, between said hoop and said wheel rim. v

6. The combination of a wheelrim, a ,shoe on said rim, a hollow endless -hoop within said shoe, a soft resilient cushion having air ycavities and grooves adapted 'to prevent heating, said cushion being placed between saidshoe and said hoop, and :a second cushion, said second cushion .beingplaced between said hoop and saidrim.

7. A tire comprising a shoe, a hollow` endless metallic hoop within said shoe, a curved resilient memberadapted to engage the inner surface of said shoe and theother periphery of said hoop, ya secondr'esilient K member curved in the opposite direction fromv said first resilient member and ada-ptn ed to engage the outersurface of said hoop -around its inner periphery. f y

8. A tire comprising a shoe, an endless hoop within said shoe' and soft rresilient mea-ns entirely surrounding said hoopand engaging the inner surface of saidshoe whereby any`pressure exerted onsaid shoe is, through the medium of said resi-lient means, distributed throughout the shoe; said resilient means being provided with air cavities to reduce heating. y

9. A tirel comprising a shoe, an endless hoop within ysaid shoe, soft resilient ymeans entirely surrounding said hoop whereby any pressure exerted on said shoe is, throughjthe 1,425,663 "v W 123)V medium of said resilient means, distributed Vhand inthe presence of two subscribing Witthroughout the shoe, said resilient means benesses, this the ifthday of May, 1915'. ing provided with air cavities to prevent j FR L, MARSHALL f f heating, and one or more passages connectf v 7 5 ing said air cavities tothe outside vatrnos- Witnesses:

phere. F. J. V. DAKIN, In testimony whereof, I hereunto set my v E. '14". UNMC. 

